My Colt has the solid brown grips while I noticed in my previous post that the absolutely beautiful pristine Colt presented had the mottled brown grips. I'm guessing mine aren't original. I have a 1951 1911 with the solid brown grips. My question is; when did Colt change the color or did they use the solid and the mottled grips concurrently? Why did they discontinue the mottled brown grips? Thanks again for all your help.